The fossil record lets us explore the ancestors that anything living (including us) evolved from
- How did this actually happen?
The fossil record lets us explore the ancestors that anything living (including us) evolved from
Evolution: Change in the genetic
composition of a population over
Human = ~27 years
Bacteria = ?
?Could new species arise from an ancestral form by adaptations to different environments?
(1) Individuals in a population vary in their traits
?What is a trait?
Trait variation comes from random mutations
(2) Some of these differences are heritable
(3) In each generation, many more offspring are produced than can survive
(4) Individuals with certain heritable traits are more likely to survive and reproduce (adaptation)
If you were a bacteria today, in 2020….
Humans = ~25 years
Bacteria = ~20 minutes
How long is the average course of antibiotic treatment?
Do you better understand new strains of SARS-CoV-2?